I think you're confusing the number of outstanding shares with the number of shares owned. MSOS is an ETF, so it's basically a basket of cannabis stocks that tries to hold each company's stock in proportion to their market value. If MSOS buys shares of CBSTF to hold in their fund that makes the price of CBSTF go up.
If I had been referring to the number of issued and outstanding shares, then yes, reducing is good, and increasing is bad.
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